"I'll demonstrate the contrary," he said, with a quick flash in his eyes. "Put your finger on my pulse." She laughingly did so. By a slight, quick movement he clasped her hand, and it appeared to him that the passion which he knew to be in his face was reflected in hers. She did not withdraw her hand. For an instant there was a subtle, swift interchange of thought. She saw he was about to speak plainly, passionately; she felt herself yielding as never before in all her experience. It was as if a wave of emotion was lifting and sweeping her away. He held her eyes; a smile began to part her lips; the thought came to him that words were not essential, that she was giving herself to him through the agency of the brilliant eyes which at the first had awakened his wondering surmises. He gently drew her to her feet, and she did not resist. He bent toward her that he might look deeper into her rosy face, and felt her sweet breath coming quickly against his cheek. Then, as his lips parted to speak, a low, deep sound far to the southeast caught his attention. Still clasping hands they faced it. With awful rapidity it approached, increasing, deepening, pervading the air to the sky, bellowing as if from the centre of the earth, filling their ears with its unutterable and penetrating power, and appalling their hearts by its supernatural weirdness. They shrank before it down the balcony and through the window into the drawing-room, cowering, trembling, speechless. They were scarcely within the apartment before the large, substantial mansion rocked as if it had been a cork, and the waters of the harbor had passed under it. The balcony on which they had stood an instant before went down, leaving gaping darkness in its place. With an agonized shriek Miss Ainsley threw her arms about Clancy. As with uncertain footing he sought to place her on a sofa they were both thrown violently upon it. He saw the chandeler swaying to and fro, as if a thousand lights were dancing before his eyes; saw the other guests staggering and falling. Statuettes, bric-a-brac, and articles of furniture came crashing down; part of the ceiling fell with a thud, raising a stifling dust, which, choking the shrieking voices, rendered more distinct the grinding sound, as walls of solid masonry drew apart, gaped, and closed under the impulse of immeasurable power. Above all rose the mysterious thunder, which was not thunder, because now it seemed to come from unknown depths. Time is but relative, and the occupants of the room felt as if they were passing through an eternity of agony. The climax of horror was reached when the gas was extinguished, and all were left in pitchy darkness. It seemed as if reason itself would go, but as suddenly as the convulsion had begun, it ceased. There was a second or two of breathless waiting, and then Clancy shouted, "Come, quick. There may be another shock."